Brachycephalus dacnis

The Brachycephalus is separated into two categories based on external appearance: the dull, cryptic-colored "flea-toads" and the more vibrant "pumpkin toadlets". B. dacnis—along with other related flea-toads—has a leptodactyliform body shape, with a slender pectoral girdle and body, well-developed hind limbs, and a long, narrow head and snout. This is in contrast to the bufoniform body plan of the pumpkin toadlets within the genus Brachycephalus, which have poorly-developed hind limbs and wider heads. Because of its developed hind limbs, Brachycephalus dacnis is capable of long-distance jumping. Its describers noted this behavior when observing individuals in natura, when one specimen jumped 21.8 centimetres (8.6 in), which is a striking 31 times its snout-vent length. In contrast, bufoniform pumpkin toadlets have very poor jumping ability. The first and fourth fingers of B. dacnis are vestigial and rounded, while the second and third are pointed. The first toe is not externally visible, but the others (three–five) are all distinct. The skin of B. dacnis is smooth, lacking the dermal ossifications seen in some other Brachycephalus species. The dorsal coloration and patterning are variable, with most specimens exhibiting shades of striped or mottled dark brown to yellowish-brown. Some specimens have leaflike or rocklike camouflage. B. …

The specific name, "dacnis", honors the Projeto Dacnis reserve on which the Brachycephalus dacnis specimens were collected, and the organization's support for biodiversity research.